Apparatus for screening liquid materials



June 23, 1931. R. o. woon ET AL APPARATUS FOR SCREENING LIQUID MATERIALS Filed Aug. 26, 1929 Ivl/CHTS 205527' O. WOOD Z BYRON L. WEST -tzor?? ,j l

. eign matter.

Patented June 23, 1931 UNITED STATES PATENT. oFFICE ROBERT O. l WOOD AND BYRON L. WEST, OF HAMBURG, NEW YORK, ASSIGNORS T0 NATIONAL ANILINE & CHEMICAL COMPANY, INC., OF YORK, N. Y., A CORPORA- TION OF NEW ,YORK

APPARATUS FOR SCREENING LIQUID MATERIALS Application filed August 26, 1929. Serial No. 388,527.

ratus for screening fluid materials, such as dye pastes, etc., to remove lumps, grit and for- It pertains to an apparatus adapted for use in a process for preparing dye pastes as described and claimed in the copending application of Robert O. Wood, Serial No. 388,526 filed of even date herewith. Such a process does not form a part of the in# vention as herein claimed.

Many finely divided materials are used in Y the fluid form and it has been dificult heretofore to remove inequalities in the consistency of such fluids. In particular, dye pastes intended for theprinting of designs on fabrics, have caused trouble. These pastes are applied to the fabric by means of a copper roll,

tor. Any depression so formed will become filled with dye paste and will cause a blemish in the printed design. Also, any lumps in the paste will either be scraped out of the design by the doctor, leaving an uncovered space which will be imparted to the cloth as a blank or, if smaller, will not be removed by the doc- Y tor and will produce a heavier spot in the linished print.

Accordingly, one of the objects ofthe present invention is to provide an apparatus for Y screening dye pastes or materials of like conv sistency which will remove all lumps, grit and foreign matter. p

Another object of the invention is to provide a screening apparatus which will be efficient in operation and inexpensive to manufacture.

A further object is to provide an apparatus which is simple in construction, practically automatic in operation, has a low maintenance cost, and which requires little or no attention during operation.

The invention 'accordinglyk comprises an apparatus embodying features of construction, combinations of elements and arrange-` ment of parts which are adapted to accomplish such objects` all as exemplified in the following detailed disclosure and defined in the claims. y 1 Y Y Asan illustrative embodiment of an appa. ratus vconstructed in accordance with the invention, the following description n is presented.

Y Figure 1. is a view in section along the line 1 1 of Fig. 2 5 and Figure 2 is a section along the line 2 2 of Fig. 1. Y

Referring to the drawings, the apparatus comprises a cylindrical or bell-shaped casing 1 having a screen 2 disposed across one end thereof, the other end or head 2 having the openings 3, 4 and 5 therein for aY purpose which will be indicated hereinafter. Y vAn inlet pipe 6 enters the casing through the opening 3 and extends inward to a point close to the surface of the screen. An outlet pipe 7 passes through the opening 5 and provides a discharge for unscreened or run-off materials which accumulate, in the casing. The inlet pipe 6 and the outlet pipe 7 are. shown each disposed at an angle of about 45 to the face'` of the screen, thus forming between them about a 90 angle. derstood that this angular placement is not limited by the above description.

The foraminous member 2 which may be a' cloth or ya wire screen of fine'mesh issoldered, welded or otherwise s uitably secured to the annular disc 9, andcovers the hexagonal opening therein. The disc 9 is clamped between the end of the casing 1 andthe in-. wardly turned flange of cap 10 which is threadedonto the end of the casing.` However, the disc may be held in place by other suitable means. T Y

In operation, material to be screened enters inlet pipe 6 and, passing through the However,v it willbe un` Y pipe, is discharged, at an angle, against the screen 2. The material sweeps across the screen and the finer portions, for the most para pass through the screen and maybe collected by suitable means, not shown. Coarse or run-off material which does not pass through the screen is discharged through the exit pipe 7 and may be recirculated into pipe 6 by suitable means, notshovfn.'` The vent l having the stand pipe 8 therein permits access of air to the interior of the screen ,chamber and serves to maintain the air presthe screen, and the pipes 6, 7 and 8 which are threaded into the head may also be removed by` a simple operation.-

It Will be readily apparent that the apparatus herein 'described exempliiiesone means for accomplishing the objects set forth. Va-

rious changes may be made in the specific details of construction and d-esign of theappa- `ratus Without departing from the scope of 'the invention as defined by the appended claims.

We claim:

1. An appara-tus of the character described comprising a screeningH chamber having a 'oraininousA member therein, means for projecting a stream of material to be screened:

directly against the foraminous member, means for conveying avvay run-o material which collects in the chamber and means for 'equalizing air pressures `on the two sides of the foraminous member.

2. An apparatus of the character described comprising a screening chamber having a oraminous member therein, means for projecting a stream of material to be-screened at an angle directly against the foraminous member, means for nconveying' away run-off material which collects in the chamber and means for equalizing air pressures on the tivo sides of the foraminous member.

8. An apparatus for screening material in angularly disposed with respect to said screen, and an air vent in said casing.

6. An apparatus for screening materials in paste form comprising a bell-shaped casingavscreen attached'to said casing, an inlet for said materials in said casing disposed at an angle of about 4.50 to said screen, an outlet for said material disposed at an angle of about 900 to said inlet, and an air vent.

7. An apparatus for screening material in paste form comprising a chamber having a foraminous member therein, means for projecting a stream of material directly against said foraminous member and means for equalizing air pressures on the tWo sides of the toraminous member.

' ROBERT O. WOOD.

BYRON L. `WEST.

paste form comprising a bell-shaped casing O having inlet and outlet openings therein, a cap threaded onto the' open end of the casing, an `annular disc carrying a screen clamped across 'the open end of the casing,

and means for projecting a stream of liquid vdirectly againstV the screen.

ing, an inlet and an outlet and ari/air vent in said casing, an annular disc Vattached to g An apparatus for screening materials Y the open end of said casing, and a screen car- Y .y V

ried by saiddisc.

5. An apparatus for screening material in paste Vform comprising a bell-shaped casing, a screen attached to said casing, an inlet and an outlet for said material in said casing 

